/* 第一件事 先写编码集  "utf8"--->转为"utf-8"*/
@charset "utf8";
/* div画圆 300*300 */
div{
	width: 300px;
	height: 300px;
	border: 1px solid transparent;
	border-radius: 50%;
	font-size: 10em;
	text-align: center;
	line-height: 300px;
	
	float: right;
}
.d1{
	background-color: red;
	
}
.d2{
	background-color: orange;
	
}
.d3{
	background-color: yellow;
	
}
.d4{
	background-color: green;
	/* 清楚浮动 */
	clear: both;
	margin-right: 54%;
	margin-top: -300px;
}

